Alright, let's solve this math problem step by step. First, we have the number 675. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 45. So, we're going to take the number 675 and add it to itself 45 times.
Step 1: 0 + 675 = 675
Step 2: 675 + 675 = 1350
Step 3: 1350 + 675 = 2025
Step 4: 2025 + 675 = 2700
Step 5: 2700 + 675 = 3375
Step 6: 3375 + 675 = 4050
Step 7: 4050 + 675 = 4725
Step 8: 4725 + 675 = 5400
Step 9: 5400 + 675 = 6075
Step 10: 6075 + 675 = 6750
Step 11: 6750 + 675 = 7425
Step 12: 7425 + 675 = 8100
Step 13: 8100 + 675 = 8775
Step 14: 8775 + 675 = 9450
Step 15: 9450 + 675 = 10125
Step 16: 10125 + 675 = 10800
Step 17: 10800 + 675 = 11475
Step 18: 11475 + 675 = 12150
Step 19: 12150 + 675 = 12825
Step 20: 12825 + 675 = 13500
Step 21: 13500 + 675 = 14175
Step 22: 14175 + 675 = 14850
Step 23: 14850 + 675 = 15525
Step 24: 15525 + 675 = 16200
Step 25: 16200 + 675 = 16875
Step 26: 16875 + 675 = 17550
Step 27: 17550 + 675 = 18225
Step 28: 18225 + 675 = 18900
Step 29: 18900 + 675 = 19575
Step 30: 19575 + 675 = 20250
Step 31: 20250 + 675 = 20925
Step 32: 20925 + 675 = 21600
Step 33: 21600 + 675 = 22275
Step 34: 22275 + 675 = 22950
Step 35: 22950 + 675 = 23625
Step 36: 23625 + 675 = 24300
Step 37: 24300 + 675 = 24975
Step 38: 24975 + 675 = 25650
Step 39: 25650 + 675 = 26325
Step 40: 26325 + 675 = 27000
Step 41: 27000 + 675 = 27675
Step 42: 27675 + 675 = 28350
Step 43: 28350 + 675 = 29025
Step 44: 29025 + 675 = 29700
Step 45: 29700 + 675 = 30375

So, 675*45 = 30375